Always check the manufacturer's tag for any special laundry instructions, and follow these.
The best way to keep your shirts as fresh and crisp as the day that you got them is a cold wash, hang dry and iron.
Wash your shirts in the washing machine with a mild detergent on a cold cycle, making sure to wash similar colors together.
Unbutton all the buttons on the shirt, including those on the cuffs and the collar.
The best way to get rid of collar ring (the stains on the inside of a collar) is to pre-treat the collar with by rubbing detergent or stain remover into the collar and letting it sit for a while before laundering.
Iron the collar first, then the cuffs, followed by the body of the shirt and finally the sleeves.
Use clean water in a steam iron, this prevents staining of your shirts.